the pilot had more than 25 years experience working in films and law enforcement. he was killed. so was a person on the ground. the crane still dangling as authorities look for ways to safely dismantle it. >>> president obama says he won't back down from a flight on his ambitious new gun control agenda. our exclusive survey usa rugbia poll found strong bay area support for his -- usa survey poll found strong bay area support. it's congress that needs convincing. >> reporter: with a stroke of a pen, president obama signed 23 executive orders combating gun violence. one directs the center for disease control to study gun violence. another helps young people get mental health treatment. >> if there's even one life that can be saved, then we've got an obligation to try. >> reporter: the president called for a ban on assault weapons and ammunition magazines with more than 10 rounds. he also wants background checks for everyone buying a gun. >> and i'm calling on congress to pass some very specific proposals right away. >> reporter: children who wrote the president after the connecticu